Goblet stem



FIG. 1 is a top perspective view showing my new design. The broken line showing the top portion of a goblet is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a top view of my design;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design of a goblet stem, as shown and described. 